- Welcome to CPCWiki forum.
The ultimate Amstrad CPC community!
News:
Printed Amstrad Addict magazine announced, check it out here!
Recent posts
#1
Technical support - Hardware related / Re: Missing Right Half of Char...
Last post by eto - Today at 20:41Quote from: dr_slump on Today at 17:39First, a photo in mode 0 showing the result of changing the pen (pen 0, pen 1, pen 2, etc.) I noticed that some of the pen modes (not all of them) have flickering pixels (like noise).
The MODE 0 screenshot can also be explained with the GateArray having an issue in it's video logic (Gate Array no longer loading the second byte into the video shift register)
In Mode 0 the pixel/bit organisation is like this:
p0b0 p1b0 p0b2 p1b2 p0b1 p1b1 p0b3 p1b3
(pNbM => pixel N Bit M)
Let's look at the upper left 2 pixels of R. In RAM, depending on the PEN we will see different bits being set.
PEN 2, the two pixels will be 00001100 in RAM (bit 1 is set = 2)
- In the video register this will be shifted 2 to the left 00110000
- now the second byte should be loaded - but this fails (for unknown reasons)
- instead the GateArray continues outputting the still present data 00110000
- 00110000 is the equivalent of PEN 4, which is white by default
- - > exactly what we see in the example, Pixel 3 and 4 repeat Pixel 1 and 2, but white
- In the video register this will be shifted 2 to the left 11000000 which is PEN 1 (bit 1 being set)
- PEN 1 is yellow, again exactly what we see: Pixel 3 and 4 repeat Pixel 1 and 2, but yellow
- In the video register this will be shifted 2 to the left 00111100 which is PEN 6 (bit 2 and 1 being set)
- PEN 6 is dark blue, again exactly what we see: Pixel 3 and 4 repeat Pixel 1 and 2, but dark blue
#2
Technical support - Hardware related / Re: Why are 3" floppies so exp...
Last post by salvogendut - Today at 20:18Quote from: BSC on Yesterday at 20:20I have a few Maxell disks which are still shrink-wrapped and in 100% mint condition. Might sell them for a completely excessive priceMight want to hold onto them a little bit more. Look what happened to those pesky bitcoins!
#3
That's actually a link to CPC-POWER, so here's the correct link to the review. 
Confession: I bought this game on eBay around 20 years ago and completely forgot about it until I found it again 2 years ago while looking through my collection!
Confession: I bought this game on eBay around 20 years ago and completely forgot about it until I found it again 2 years ago while looking through my collection!
#4
Technical support - Hardware related / Re: Missing Right Half of Char...
Last post by ZorrO - Today at 19:23
#5
Cheers, got some brainstorming to do for a project tomorrow, this will be perfect in a side-window
#6
Quote from: Gryzor on Today at 18:02Link to the video, please🙂It's an hour of rambling nonsense but here you go:
ChinnyVision 2 is the secondary channel where I do more random stuff so don't expect it to be exciting or any good. I just speak my brains really.
#7
D
Technical support - Hardware related / Re: Missing Right Half of Char...
Last post by dr_slump - Today at 18:07Quote from: Bryce on Yesterday at 14:33Hi dr_slump,I have checked all the resistors and the traces between the multiplexers and the RAM chips, and everything seems fine. For example, the resistance between pin 9 in IC105 and pin 5 in each memory chip is 120 ohm +/- 2 ohm. The same for pins 7 and 9 for all the multiplexers and their correponding memory pins.
could you check the resistors R146 to R153 (scattered around the chips at the bottom of the board) and see if any of them are physically broken or reading open circuit? If they are all ok, I'd suspect that the multiplexers could be the problem.
Bryce.
#8
Link to the video, please🙂
#9
Quote from: Prodatron on 20:46, 13 July 25I wish we could have the same for Amstrad, but I'm not sure how enthusiastic Lord A.M.S. is about the CPC spirit. At least it's very cool and an honor to have the CPC as the title screen of his new website.
Please can the money men leave the CPC alone! We've held this community together for 30 years, we don't need people sniffing around to see how they can feather their own nests off the back of the work of the people here and other CPC communities around the world.
I'd remind everyone that NONE of this new C64 would be possible without the C64 community efforts. From the file formats like the D64 and T64 through to the documenting of the chips so they can be recreated on an FPGA.
This new company are standing on the shoulders of giants and will take all the glory and money. I don't want that for the CPC. We've managed so far, leave us alone!
#10
Did a video on ChinnyVision 2 where I go through their website and there are certainly questions. The reaction was astonishing. The video questions a few decisions but basically says 'good luck to them but ensure you go into this with your eyes wide open and pay for it on your credit card.
Well you'd have thought I'd personally attacked their grandmothers! Even had what are very obviously bot accounts appear in the comments!
It does look like a good deal but they need to stop pretending they are the original Commodore and trying to legitimise themselves with people like David Pleasance (or the Amiga Brian Butterfield as I call him). You are a group of users who have bought the trademarks and are putting 3 existing products into 1 package for a good price. Great. Stop all this Hollywood film flam and stop saying things like "It's what Jack Tramiel would have wanted'. Who are you, Doris Stokes?*
I wish them well, I really do. It has to work or a lot of people are going to lose their money. And nobody wants to see that.
* One for the teenagers
Well you'd have thought I'd personally attacked their grandmothers! Even had what are very obviously bot accounts appear in the comments!
It does look like a good deal but they need to stop pretending they are the original Commodore and trying to legitimise themselves with people like David Pleasance (or the Amiga Brian Butterfield as I call him). You are a group of users who have bought the trademarks and are putting 3 existing products into 1 package for a good price. Great. Stop all this Hollywood film flam and stop saying things like "It's what Jack Tramiel would have wanted'. Who are you, Doris Stokes?*
I wish them well, I really do. It has to work or a lot of people are going to lose their money. And nobody wants to see that.
* One for the teenagers